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• Speed up FFMPEG Mixing Two Audio Files slow

  21 septembre 2016, par Jeremy

  I’m working on a FFMPEG command to mix two audio input’s, combine them (layer ontop of each other), adjust their volumes, and print out to an output. On a 99 second input, it takes about 93 seconds to finish processing and on Mobile, that is way to long.

  I’ve read that I could possibly use -copy to skip reencoding the files, but am unsure of how to do this. Only one of the files are created by the user, so the second input could just be a copy. I have tried using the different presets, fast, ultrafast, and medium but still there is a time delay.

  FFMPEG Command :
  http://pastebin.com/b9u4Snxw

  Any ideas on how to speed this up and reduce processing time ?

  EDIT : Here are my Logs from a successful mix of a recording that was 30 seconds long.
  http://pastebin.com/WxAYWimi

• /bin/sh : ffmpeg : command not found while merge audio with with using ffmpeg aws lamda [duplicate]

  1er mai 2023, par bhavesh kaila

  I am trying to merge audio with video using the below command in AWS lambda using Python but the getting and below error.

  


  ffmpeg Command

  


  cmd = 'ffmpeg  -stream_loop -1 -i mayur.mp4 -i audio.mp3 -shortest -map 0:v:0 -map 1:a:0 -y out/output.mp4'
subprocess.call(cmd, shell=True) 


  


  Aws Lambda Error

  


  2023-05-01T16:08:18.591+05:30   INIT_START Runtime Version: python:3.10.v2 Runtime Version ARN: arn:aws:lambda:eu-north-1::runtime:7764dc7f3ff1fc45718f596be4cd03d7bca223f0586f3bfa5fe6584d6af81cd8

2023-05-01T16:08:19.631+05:30   START RequestId: 4557a174-e12c-4924-971a-ef8f852b106b Version: $LATEST

2023-05-01T16:08:22.286+05:30

Copy
/bin/sh: ffmpeg: command not found
/bin/sh: ffmpeg: command not found

2023-05-01T16:08:23.926+05:30   [ERROR] FileNotFoundError: [Errno 2] No such file or directory: '/tmp/output.mp4' Traceback (most recent call last):   File "/var/task/lambda_function.py", line 65, in lambda_handler     s3_upload_response = s3.put_object(Bucket=bucket, Body=open('/tmp/output.mp4', 'rb'), Key =filename)

2023-05-01T16:08:23.929+05:30   END RequestId: 4557a174-e12c-4924-971a-ef8f852b106b


  


  Full Code snippet

  


  import json
from gtts import gTTS
import openpyxl
import boto3
import base64
import openai
import os
import random
import ffmpeg
import subprocess

# os.system("cp -ra bin/ffmpeg /tmp/")
# os.system("chmod -R 775 /tmp")

#from botocore.vendored import requests
language = 'en'
def lambda_handler(event, context):
    input1 = event["queryStringParameters"]['question']
    outputText=""
    
    # Define variable to load the dataframe
    dataframe = openpyxl.load_workbook('QNA/Book1.xlsx')
    
      #accesskey and secretkey for the S3 bucket
    accesskey = os.getenv("access_key")
    secretkey = os.getenv("secret_key")
    
    # Define variable to read sheet
    ws = dataframe['Sheet1']
    
    for row in ws.iter_rows(0,dataframe.active.max_row):
        for cell in row:
          #print(cell.value)
          if input1 in str(cell.value):
            outputText=row[1].value
  
    
    
      #Save Audio File
    audio = gTTS(text=outputText, lang=language, slow=False)
    audio.save("/tmp/audio.mp3")
    
    cmd='ffmpeg -stream_loop -1 -i QNA/mayur.mp4 -i tmp/audio.mp3 -shortest -map 0:v:0 -map 1:a:0 -y tmp/output.mp4'
    subprocess.run(cmd, shell=True)


  


  Note : I Download the static library from Here and added it to the python folder and generate python.zip with other dependencies and upload it on the aws layer and the AWS layer is linked with the python function.

  


  Note : Above code is working fine with google codelab and is able to generate a merged video working fine.

  


  Any help would be appriciated

  


• How to create a rounded background under text using ASS subtitle file ? [closed]

  26 novembre 2023, par Lionel Lakson

  

  


  [Script Info]
Title : Default Aegisub file
ScriptType : v4.00+
Collate : UTF-8
WrapStyle : 0
ScaledBorderAndShadow : yes
YCbCr Matrix : None
PlayResX : 640
PlayResY : 480

  


  [V4+ Styles]
Format : Name, Fontname, Fontsize, PrimaryColour, SecondaryColour, OutlineColour, BackColour, Bold, Italic, Underline, StrikeOut, ScaleX, ScaleY, Spacing, Angle, BorderStyle, Outline, Shadow, Alignment, MarginL, MarginR, MarginV, Encoding
Style : Default,Helvetica,30,&H00FFFFFF,&H000000FF,&H00000000,&H00000000,1,0,0,0,101,104,-5,0,1,1,1,5,10,10,0,1

  


  [Events]
Format : Layer, Start, End, Style, Name, MarginL, MarginR, MarginV, Effect, Text
Dialogue : 0,0:00:00.00,0:00:02.00,Default,,0,0,0,,\b900 \t(0,200,\fs20,\fs30)This is highlighted text.